How dangerous are oil-bearing Second World War wrecks today?
Short answerThey can be a major present-day hazard; a dedicated Bruships discussion covers the fuller subject.
NotesThe question cites reports that oil was removed from the wreck of the German cruiser Prinz Eugen because deteriorating tanks risked rupture. Surviving Second World War wrecks are described as a major present-day danger. The brief answer does not assess Prinz Eugen's condition or explain the remediation, instead directing viewers to a separate Bruships discussion. This watch point establishes the scale of the issue while preserving the limits of what is explained here.